Reliability-based design optimization of nonlinear aeroelasticity problems

Samy Missoum, Christoph Dribusch, Philip Beran

Research output: Contribution to journalArticle

33 Scopus citations

Abstract

This paper introduces a methodology for the reliability-based design optimization of systems with nonlinear aeroelastic constraints. The approach is based on the construction of explicit flutter and subcritical limit cycle oscillation boundaries in terms of deterministic and random design variables. The boundaries are constructed using a support vector machine that provides a way to efficiently evaluate probabilities of failure and solve the reliability-based design optimization problem. Another major advantage of the approach is that it efficiently manages the discontinuities that might appear during subcritical limit cycle oscillations. The proposed approach is applied to the construction of flutter and subcritical limit cycle oscillation boundaries for a two-degree-of-freedom airfoil with nonlinear stiffnesses. The solution of a reliability-based design optimization problem with a constraint on the probability of subcritical limit cycle oscillation is also provided.

Original languageEnglish (US)
Pages (from-to)992-998
Number of pages7
JournalJournal of Aircraft
Volume47
Issue number3
DOIs
StatePublished - 2010

ASJC Scopus subject areas

  • Aerospace Engineering

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